--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -192,7 +192,7 @@
 
 if(ENABLE_IRC)
 	find_package(Communi)
-	find_package(Qt5 COMPONENTS Core Network)
+	find_package(Qt6 COMPONENTS Core Network REQUIRED)
 endif()
 
 find_package(event)
--- a/backends/libcommuni/CMakeLists.txt
+++ b/backends/libcommuni/CMakeLists.txt
@@ -4,8 +4,8 @@
 if(ENABLE_QT4)
 	QT4_WRAP_CPP(SRC ${HEADERS} OPTIONS -DBOOST_TT_HAS_OPERATOR_HPP_INCLUDED)
 else()
-	QT5_WRAP_CPP(SRC ${HEADERS} OPTIONS -DBOOST_TT_HAS_OPERATOR_HPP_INCLUDED)
-	include_directories(${Qt5Core_INCLUDE_DIRS} ${Qt5Network_INCLUDE_DIRS})
+	qt6_wrap_cpp(SRC ${HEADERS} OPTIONS -DBOOST_TT_HAS_OPERATOR_HPP_INCLUDED)
+	include_directories(${Qt6Core_INCLUDE_DIRS} ${Qt6Network_INCLUDE_DIRS})
 endif()
 
 add_definitions(-DQT_NO_KEYWORDS)
@@ -15,13 +15,13 @@
 	if(ENABLE_QT4)
 		target_link_libraries(spectrum2_libcommuni_backend ${IRC_LIBRARY} Qt4::QtNetwork Qt4::QtCore transport pthread)
 	else()
-		target_link_libraries(spectrum2_libcommuni_backend ${IRC_LIBRARY} Qt5::Network Qt5::Core transport pthread)
+		target_link_libraries(spectrum2_libcommuni_backend ${IRC_LIBRARY} Qt6::Network Qt6::Core transport pthread)
 	endif()
 else()
 	if(ENABLE_QT4)
 		target_link_libraries(spectrum2_libcommuni_backend ${IRC_LIBRARY} Qt4::QtNetwork Qt4::QtCore transport)
 	else()
-		target_link_libraries(spectrum2_libcommuni_backend ${IRC_LIBRARY} Qt5::Network Qt5::Core transport)
+		target_link_libraries(spectrum2_libcommuni_backend ${IRC_LIBRARY} Qt6::Network Qt6::Core transport)
 	endif()
 endif()
 
--- a/cmake_modules/FindCommuni.cmake
+++ b/cmake_modules/FindCommuni.cmake
@@ -2,14 +2,14 @@
 	find_package(Qt4)
 	include( ${QT_USE_FILE} )
 else()
-	find_package(Qt5Network)
+	find_package(Qt6 COMPONENTS Network REQUIRED)
 endif()
 
 FIND_LIBRARY(IRC_LIBRARY NAMES IrcCore PATHS ${QT_LIBRARY_DIR})
 if( ENABLE_QT4 )
 	FIND_PATH(IRC_INCLUDE_DIR NAMES "IrcCore/ircglobal.h" PATHS ${QT_INCLUDE_DIR} PATH_SUFFIXES Communi)
 else()
-	FIND_PATH(IRC_INCLUDE_DIR NAMES "IrcCore/ircglobal.h" PATHS ${Qt5Core_INCLUDE_DIRS} ${Qt5Core_INCLUDE_DIRS}"/.." PATH_SUFFIXES Communi)
+	FIND_PATH(IRC_INCLUDE_DIR NAMES "IrcCore/ircglobal.h" PATHS ${Qt6Core_INCLUDE_DIRS} ${Qt6Core_INCLUDE_DIRS}"/.." PATH_SUFFIXES Communi)
 endif()
 
 # message( STATUS ${IRC_LIBRARY})